US3767959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filament mount for a single ended tungsten halogen lamp
Assignee: GTE Sylvania Inc
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Filing: 1971-02-24
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Granted: 1973-10-23
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Expires: 1991-02-24
Abstract
Abstract A support wire, having a bend near one end, is inserted into the coiled leg of a tungsten filament having a coiled body. The coiled leg is flexible enough to permit complete insertion of the support wire therein and to adapt the shape of the leg to that of the wire. The filament and wire assembly is then heat treated to modify the tungsten microstructure and stabilize the filament.
Inventors
- 👤 F George
- 👤 E Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:28
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/02; H01K1/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
A tungsten filament assembly for a single ended tungsten halogen lamp comprising: a stabilized tungsten filament having an elongated coiled body and two coiled legs protruding substantially orthogonally therefrom, the legs being integral extensions of the primary coiling of said body; two tungsten support wires, one each inserted into each coiled leg for substantially only the entire length of said leg, each support wire having an obtuse angle bent at the inserted portion thereof, each support wire being longer than said legs, the inserted ends of the support wires being substantially parallel to each other, the other ends of the support wires also being substantially parallel to each other but spaced closer together than are said inserted ends; and separate molybdenum ribbon connectors connected to said other ends of the support wires.
Claim 2
Dependent Claim
132 words
A tungsten filament assembly for a single ended tungsten halogen lamp comprising: a stabilized tungsten filament having an elongated coiled body and two coiled legs protruding substantially orthogonally therefrom, the legs being integral extensions of the primary coiling of said body; two tungsten support wires, one each inserted into each coiled leg for substantially only the entire length of said leg, each support wire having an obtuse angle bent at the inserted portion thereof, each support wire being longer than said legs, the inserted ends of the support wires being substantially parallel to each other, the other ends of the support wires also being substantially parallel to each other but spaced closer together than are said inserted ends; and separate molybdenum ribbon connectors connected to said other ends of the support wires.
Claim 3
Dependent Claim
24 words
The filament assembly of claim 1 wherein the space between the ends of said legs is less than the body length of said filament.
Claim 4
Dependent Claim
20 words
The filament assembly of claim 2 wherein the uninserted Portions of said support wires are substantially parallel to each other.
Claim 5
Dependent Claim
18 words
The filament assembly of claim 3 wherein said support wires comprise the legs of a single U-shaped wire.
Claim 6
Dependent Claim
19 words
The filament assembly of claim 1 wherein the bend in said support wire effects a narrower spacing between legs.
References Cited (Backward Citations)
US2848642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |